Best Thermal Paste in 2026

Published June 2026  ·  By TempCore Editorial Team  ·  8 min read

What Thermal Paste Actually Does

Thermal paste isn’t magic. Its only job is to fill the microscopic gaps between two flat metal surfaces (your CPU’s integrated heat spreader and your cooler’s base plate) so that heat can transfer efficiently. Without paste, those surfaces touch at only a few high points, leaving air gaps in between. Air is a terrible thermal conductor — about 30 times worse than even a mediocre paste.

That’s why the difference between “bad paste” and “good paste” is roughly 2–4°C, while the difference between “no paste” and “any paste” is 30°C or more. Almost any modern paste from a reputable brand will get you within touching distance of the best. Application technique and the cooler itself matter more than which paste you choose.

Our 2026 Picks

Best Overall: Arctic MX-6

Arctic’s flagship paste landed in 2022 and remains the easiest recommendation for everyone. Around $10 for a 4 g tube, electrically non-conductive (you won’t fry your motherboard if you spill some), thick enough to spread evenly without running, and rated for 8+ years before it dries out. Performance is within 1–2°C of the most expensive pastes on the market in independent testing. There is no realistic scenario where MX-6 is the wrong answer for a typical desktop or laptop CPU.

Best Performance Paste: Thermal Grizzly Kryonaut Extreme

If you’re pushing a 250W+ chip on air, or your benchmark numbers matter to you, Kryonaut Extreme is the highest-performing standard (non-liquid-metal) paste available. Expect 1–3°C cooler than MX-6 in heavy loads. Costs ~$20 for a smaller tube, and the formula starts to degrade faster than MX-6 (3–5 years before it noticeably loses conductivity), so it’s overkill for a set-and-forget build.

Get this if: you have an i9-14900K or Ryzen 9 7950X on air cooling, you do regular benchmarks, or you just want the best without going to liquid metal.

Best for Beginners: Noctua NT-H1 (or NT-H2)

The Noctua tube that ships with their coolers is one of the most forgiving pastes to apply. It has a thicker consistency than MX-6 (closer to peanut butter than mayonnaise), so it sits where you put it instead of spreading thin and migrating. Performance is virtually identical to MX-6. NT-H1 at ~$8 is excellent value; NT-H2 at ~$14 is marginally better but the gap is below the noise floor of normal measurement.

Get this if: you’re doing your first build or first repaste and want forgiveness.

Best for Laptops: Honeywell PTM7950 (phase-change pad)

This isn’t a traditional paste — it’s a phase-change thermal pad that comes as a thin square sheet. You cut it to size, peel both backings, and place it on the die. The first time the CPU heats up, the pad melts into a thin film that fills gaps better than any paste.

Why this matters for laptops specifically: traditional paste in laptops suffers from “pump-out” — the paste gradually migrates away from the centre of the die over time, leaving a paste-thin spot exactly where the die is hottest. Laptops experience this faster because they thermal-cycle harder. PTM7950 is solid at room temperature and doesn’t pump out. Many users see 10–20°C drops on laptops just from switching from old paste to PTM7950.

Trade-off: harder to find from legit sellers (lots of counterfeits on Amazon — buy from a verified source), and you only really need it on laptops or extremely high-end desktop chips.

Best Value: Arctic MX-4

The previous-generation Arctic paste, still widely sold. ~$7 for a 4 g tube. Roughly 1–2°C warmer than MX-6 but otherwise identical: non-conductive, easy to spread, long shelf life. Worth it only if MX-6 is out of stock or significantly more expensive in your region.

Liquid Metal: Thermal Grizzly Conductonaut Extreme (with cautions)

Liquid metal — usually gallium-based — performs 5–10°C cooler than the best regular paste. It also has serious drawbacks you must understand before applying:

• Electrically conductive. A drop on the motherboard kills it. A drop bridging socket pins kills the CPU.
• Corrodes aluminium. Many cooler base plates are aluminium. Liquid metal will eat them and cause leaks. Only use on nickel-plated copper.
• Needs reapplication every 1–2 years. The gallium absorbs into the cooler base over time.
• Hard to remove. Cleanup requires the specific cleaning kit and a lot of patience.

Get this if: you’re delidding a CPU (applying directly to the die under the heat spreader), you’re extreme overclocking with sub-ambient cooling, or you have a laptop with a copper-only heat pipe and an experienced friend to walk you through it. Otherwise it’s a bad idea that costs more and risks expensive hardware for 5°C.

Pastes to Avoid (or De-Prioritise)

Not bad pastes — just outdated, mismatched, or overpriced for what they do:

• Arctic Silver 5. A legend from 2005. Now significantly outperformed by every modern competitor and contains trace silver that can theoretically cause conductivity issues if applied recklessly. No reason to use it in 2026.
• The grey paste that came with your cooler. Usually a generic silicone-based paste that performs 3–6°C worse than MX-6. Use it once if that’s what you have, then upgrade on your next repaste.
• Cheap eBay 25 g tubes for $5. The thermal performance ranges from acceptable to terrible, the labels often don’t match the actual chemistry, and many contain compounds that pump out or dry inside a year.
• Most diamond-pasted “extreme” pastes. The diamond particle additive sounds impressive but doesn’t meaningfully outperform a quality non-metallic paste. You’re paying for marketing.

How to Apply It (The Bit That Matters More Than the Brand)

There are three application methods that all work. Pick one, do it carefully, and you’ll get within 1°C of the others:

• Pea method (recommended): A single drop of paste roughly the size of a small pea (~4 mm diameter) in the centre of the CPU’s heat spreader. Mount the cooler with even pressure. The cooler spreads the paste outward as it’s tightened. Works for ~95% of cases.
• X method: Two thin lines crossing in an X across the IHS. Good for larger CPUs (Threadripper, Xeon) where a single pea doesn’t spread evenly.
• Spread method: Use a plastic card or the included spreader to manually apply a thin even layer across the IHS before mounting. Most controlled but most likely to introduce air bubbles if done poorly.

How Often to Repaste

For modern desktop CPUs with quality paste (MX-6, NT-H1, Kryonaut), every 4–6 years is plenty. Most paste won’t meaningfully degrade in that window. Repaste sooner if you remove the cooler for any reason (RAM swap, cleaning), since pulling the cooler breaks the existing seal.

For laptops, repaste every 2–3 years with regular paste, or once with PTM7950 for indefinite use. Laptops thermal-cycle more aggressively, which accelerates paste pump-out.

For liquid metal, repaste every 1–2 years. The gallium absorbs into the cooler over time and performance degrades.

Quick Reference

The Bottom Line

The thermal paste category has matured. The cheap reliable options are within 2°C of the expensive ones, and any quality paste applied correctly will outperform a quality paste applied carelessly. Pick MX-6 unless you have a specific reason not to, apply a pea-sized drop, and don’t think about it again for half a decade.

If your temps are still high after a fresh repaste with a good paste, the bottleneck isn’t the paste. Check your cooler mounting pressure, your case airflow, or whether you’ve hit one of the situations in our CPU temperature guide.